O
O
P
A
2
2
P
A
2
O
7
7
7
P
A
4
7
OPA277
OPA2277
OPA4277
2
7
7
OPA2277
OPA277
O
P
A
4277
O
P
O
P
A
A
2
2
2
7
7
7
7
SBOS079A – MARCH 1999 – REVISED APRIL 2005
High Precision
OPERATIONAL AMPLIFIERS
FEATURES
DESCRIPTION
The OPA277 series precision op amps replace the industry
standard OP-177. They offer improved noise, wider output
voltage swing, and are twice as fast with half the quiescent
current. Features include ultra low offset voltage and drift, low
bias current, high common-mode rejection, and high power
supply rejection. Single, dual, and quad versions have identical
specifications for maximum design flexibility.
ꢀ ULTRA LOW OFFSET VOLTAGE: 10µV
ꢀ ULTRA LOW DRIFT: ±0.1µV/°C
ꢀ HIGH OPEN-LOOP GAIN: 134dB
ꢀ HIGH COMMON-MODE REJECTION: 140dB
ꢀ HIGH POWER SUPPLY REJECTION: 130dB
ꢀ LOW BIAS CURRENT: 1nA max
OPA277 series op amps operate from ±2V to ±18V supplies with
excellent performance. Unlike most op amps which are specified
at only one supply voltage, the OPA277 series is specified for
real-world applications; a single limit applies over the ±5V to
±15V supply range. High performance is maintained as the
amplifiers swing to their specified limits. Because the initial offset
voltage (±20µV max) is so low, user adjustment is usually not
required. However, the single version (OPA277) provides exter-
nal trim pins for special applications.
ꢀ WIDE SUPPLY RANGE: ±2V to ±18V
ꢀ LOW QUIESCENT CURRENT: 800µA/amplifier
ꢀ SINGLE, DUAL, AND QUAD VERSIONS
ꢀ REPLACES OP-07, OP-77, OP-177
APPLICATIONS
ꢀ TRANSDUCER AMPLIFIER
OPA277 op amps are easy to use and free from phase inversion
and overload problems found in some other op amps. They are
stable in unity gain and provide excellent dynamic behavior over
a wide range of load conditions. Dual and quad versions feature
completely independent circuitry for lowest crosstalk and free-
dom from interaction, even when overdriven or overloaded.
ꢀ BRIDGE AMPLIFIER
ꢀ TEMPERATURE MEASUREMENTS
ꢀ STRAIN GAGE AMPLIFIER
ꢀ PRECISION INTEGRATOR
ꢀ BATTERY POWERED INSTRUMENTS
ꢀ TEST EQUIPMENT
Single (OPA277) and dual (OPA2277) versions are available
in DIP-8, SO-8, and DFN-8 (4mm x 4mm) packages. The quad
(OPA4277) comes in DIP-14 and SO-14 surface-mount pack-
ages. All are fully specified from –40°C to +85°C and operate
OPA277
Offset Trim
1
2
3
4
8
7
6
5
Offset Trim
V+
from –55°C to +125°C.
OPA277AIDRM
–In
+In
V–
Output
NC
Offset Trim
−In
1
2
3
4
8
7
6
5
Offset Trim
V+
OPA4277
Pin 1
Indicator
Out A
–In A
+In A
V+
1
14 Out D
13 –In D
12 +In D
11 V–
8-Pin DIP, SO-8
2
3
4
5
6
7
+In
Output
NC
A
B
D
C
OPA2277AIDRM
V−
Out A
−In A
+In A
V−
1
2
3
4
8
7
6
5
Out B
+In B
–In B
Out B
10 +In C
Pin 1
Indicator
DFN-8 4mm x 4mm
(top view)
9
8
–In C
OPA2277
Thermal Pad
on Bottom
(Connect to V−)
V+
Out C
Out A
–In A
+In A
V–
1
2
3
4
8
V+
−In B
+In B
A
14-Pin DIP, SO-14
7
Out B
–In B
+In B
B
6
5
DFN-8 4mm x 4mm
(top view)
Thermal Pad
on Bottom
NC = No connection.
8-Pin DIP, SO-8
(Connect to V−)
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Copyright © 1999-2005, Texas Instruments Incorporated
www.ti.com
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